obama care doesn't make it less expensive. >> reporter: he wants obama cari gone, including the drug prescriptions for seniors. but he wants to keep pieces of the health care plan. although he doesn't say how it will work. >> we have to make sure that people who have pre-existing conditions are able to get insured. and folks who don't get sick don't get dropped by their insurance companies. >> reporter: romney and his running mate, paul ryan, proposed to cut medicaid by the next ten years, give states more control over their medicaid funds. overhaul medicare, people now younger than 55, when they reach retirement would have the option of getting a voucher to purchase private insurance. or they could stick with traditional medicare. >> this is designed to guarantee that seniors can always afford medicare coverage, no exceptions. >> now, there is major differences between the candidates, but perhaps the biggest split is over medicaid. many think of it as a safety net for the poor. but what it actually covers is poor families, pregnant women, people with disabilities as well as senior c